docs: def regex_chooser(alg):
      """
      Select an appropriate regex for the type of number of interest.
  
      Parameters
      ----------
      alg : ns enum
          Used to indicate the regular expression to select.
  
      Returns
      -------
      regex : compiled regex object
          Regular expression object that matches the desired number type.
  
      """
      if alg & ns.FLOAT:
          alg &= ns.FLOAT | ns.SIGNED | ns.NOEXP
      else:
          alg &= ns.INT | ns.SIGNED
  
      return {
          ns.INT: NumericalRegularExpressions.int_nosign(),
          ns.FLOAT: NumericalRegularExpressions.float_nosign_exp(),
          ns.INT | ns.SIGNED: NumericalRegularExpressions.int_sign(),
          ns.FLOAT | ns.SIGNED: NumericalRegularExpressions.float_sign_exp(),
          ns.FLOAT | ns.NOEXP: NumericalRegularExpressions.float_nosign_noexp(),
          ns.FLOAT | ns.SIGNED | ns.NOEXP: NumericalRegularExpressions.float_sign_noexp(),
      }[alg]